To obtain a chloride, 10 liters of chlorine and 15 liters of hydrogen took 10 liters.

To obtain a chloride, 10 liters of chlorine and 15 liters of hydrogen took 10 liters. How did not spend from gases after the end of the reaction? What is the volume of gas residue?

We will assume that the reaction proceeds to the complete exhaustion of one of the components of the reaction mixture.

Gaza interact in reaction:

H2 + CL2 = 2HCl

From the stoichiometry of the reaction it follows that gases interact in a molar ratio of 1: 1. For gas reactions, the molar ratios of components coincide with volumetric, that is, the volumes of reacted chlorine and hydrogen will be equal. Under the conditions of the problem, hydrogen in the system is greater, and therefore part of it will remain unemployed at the end of the reaction.

V (unreacted H2) = 15 – 10 = 5 liters.